Milwaukee police Lt. Chris Moews ran against and lost to Clarke four years ago. He said things are different this time.

"The current sheriff doesn't get along with anybody, and we need a sheriff that's going to work cooperatively and collaboratively with every stakeholder across Milwaukee County," Moews said. "And that leadership is going to help us be fiscally responsible to work within our budget. If we need additional officers, to advocate for that."

"If you look at the qualifications, this is a mismatch. My opponent is a lieutenant. He was a lieutenant four years ago when he ran against me. His career has not progressed, which means to me, even his boss, Chief Flynn, does not think much of his ability to lead or command that he has not promoted him in that four-year time," Clarke said.

The union-backed Greater Wisconsin Committee is also campaigning against Clarke, who has encouraged people to arm themselves against criminals.

"You know, we've got a very controversial sheriff here who has a record of failure, and I believe they want to see new leadership in this office and in this county," Moews said.

"The nearly half million dollars being put in by third parties, special interests, which is legal all right, to defeat me. I find it flattering," Clarke said.

Clarke has been in office for more than 10 years, been reelected twice, and it will soon be known if voters will make this his most serious challenge yet.

The Democratic primary for Milwaukee County sheriff is Tuesday with the winner going on to face independent candidate, Angela Walker, in the general election in November.

QUICK THINKING AND QUICK ACTION. NO ONE WAS HURT. THE CAUSE OF THE FIRE IS UNDER INVESTIGATION. QUICK THE DEMOCRATIC CANDIDATES FOR MILWAUKEE COUNTY SHERIFF'S ARE CAMPAIGNING TONIGHT. THE PRIMARY IS DANES AWAY. DAVID CLARK IS FACING CHRIS MAYS. CLARK IS ALSO BATTLING SPECIAL INTEREST MONEY. QWEST MILWAUKEE POLICE LIEUTENANT CHRIS MAYS RAN AGAINST AND LOST TO DAVID CLARK FOUR YEARS AGO. HE SAYS THINGS ARE DIFFERENT THIS TIME. THE SHERIFF DOES NOT GET ALONG WITH ANYBODY. WE NEED A SURE WHO IS MORE WATER. THAT LEADERSHIP IS GOING TO ENABLE US TO BE RESPONSIBLE, TO WORK WITHIN OUR BUDGET. WE NEED ADDITIONAL OFFICERS TO ADVOCATE FOR THAT. THIS IS A MISMATCH. MY OPPONENT IS A LIEUTENANT. HE WAS A LIEUTENANT FOUR YEARS AGO WHEN HE RAN AGAINST ME. HIS CAREER HAS NOT PROGRESSED. EVEN CHIEF FLYNN DOES NOT THINK MUCH OF HIS ABILITY TO COMMAND. THE UNION BACK COMMITTEE IS ALSO CAMPAIGNING AGAINST CLARK. HE HAS ENCOURAGED PEOPLE TO ARM THEMSELVES AGAINST CRIMINALS. WE HAVE A CONTROVERSIAL SARAH. -- CONTROVERSIAL SHERIFF. WE HAVE A HALF MILLION DOLLARS INCLUDING BY THIRD-PARTY GROUPS. I FIND IT FLATTERING. OR CLARK HAS BEEN IN OFFICE MORE THAN 10 YEARS THE -- 10 YEARS. IN MILWAUKEE , TERRY SATER, THE VERIZON 12 NEWS.